1020

Question 1

To read system pressure the service valves are placed in the _____ position

Answer 1

Cracked

Question 2

The ____ rejects heat in the refrigeration cycle

Answer 2

Condenser

Question 3

The ____ absorbs heat in the refrigeration cycle

Answer 3

Evaporator

Question 4

The condenser performs three functions when operating properly. Name these functions in the order in which they occur.

Answer 4

Desuperheating
Condense
Subcooling

Question 5

The purpose of the TEV is to maintain a nearly constant ____
with varying toads on the
evaporator.

Answer 5

Superheat

Question 6

The TEV sensing bulb is connected to the
of the evaporator coil.

Answer 6

Outlet

Question 7

An increase in superheat causes the pressure on top of the TEV’s diaphragm to

Answer 7

Increase

Question 8

A pump down procedure is started when the
valve is front seated

Answer 8

Liquid line

Question 8

Which type of system is considered a critical charge?

Answer 8

Cap tube

Question 9

The receiver is located in the

Answer 9

Liquid line

Question 10

To accurately measure a deep vacuum you would use

Answer 10

Vacuum gauge

Question 11

The most accurate method of charging a self-contained system (refrigerator, window unit) is?

Answer 11

Weigh-in

Question 11

Vapor refrigerant is added to an operating system through the

Answer 11

Suction line

Question 12

The term evacuation refers to?

Answer 12

Using vacuum pump

Question 13

A fan cycle control on the condenser motor is used to

Answer 13

Lower head pressure in hot weather

Question 14

A refrigerator system holds 8 pounds and 12 ounces of refrigerant cylinder weighs 34 pounds and 5 ounces. How much should the cylinder weigh after the system is properly charged?

Answer 14

25 pounds and 9 ounces

Question 15

A R134A system is operating with a low side pressure of 24 psig and a high side pressure of
140 psig. The suction line temperature in 35F and liquid line temperature of 95F. What is the superheat?

Answer 15

9F Find sat temp of low side pressure

Question 16

When liquid charging the refrigeration system should be ____
and liquid refrigerant
should be charged in to the ____

Answer 16

ON; liquid line

Question 17

What would happen to the head pressure if the condenser fan motor did not operate?

Answer 17

Increase

Question 18

What happens to compressor amperage draw with an increase in head pressure?

Answer 18

Increase

Question 19

What happens to the superheat with a dirty evaporator?

Answer 19

Increase

Question 20

There are two places in a system that divide the low and high side. One is the valves in the compressor and the second one is the

Answer 20

Expansion device